What is the transmission of heat through molecular structure called?

The transmission of heat through molecular structure is called conduction. Conduction is the process by which heat energy is transferred through collisions between neighboring atoms or molecules. When one part of an object is heated, the molecules in that area gain energy and vibrate more vigorously. This energy is then passed on to adjacent molecules through direct contact, resulting in a transfer of heat from the hot region to the cooler region. Conduction primarily occurs in solids, where the molecules are closely packed together, facilitating efficient energy transfer. Metals are excellent conductors of heat because their molecular structure allows for free movement of electrons, which aids in the rapid transfer of thermal energy. In contrast, conduction is less effective in gases and liquids, where molecules are farther apart. Therefore, the correct answer is [A] conduction, as it accurately describes the process of heat transfer through molecular interactions.